Row 15 has 41 seats, and the entire section has 493 seats.
We can write the explicit formula for an arithmetic sequence to represent this, since we add 2 each time:
13+2(n-1)
Using 15 for n,
13+2(15-1) = 13+2(14) = 13+28 = 41
To find the total number of seats, we evaluate the sum

Using technology to evaluate this sum, it is 493.
Simplify
10x - 4x = 36
6x = 36
Divide by 6
Solution: x = 6
No there just has to be one or two on the line
Answer:
The correct answer is 20%
Hope this helped! :)
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